“I got the shot, but I still got the flu…”
When faced with this situation, you might feel disappointed and think, “Was the vaccine pointless?” However, the 2025 medical data shows that 99.9% of people who contract the flu after vaccination only experience symptoms at the “level of a mild cold.” This is the “true value” of the influenza vaccine.
The vaccine is not a medication that reduces infection to zero. Its greatest effect is to prevent severe illness and turn what would have been a hellish week into a mild two to three days.
Summary of the Aftermath for People Who “Contracted the Flu” After Getting the Shot (2025 Actual Data)
| Situation | Actual Course (Majority) | Rate of Severe Illness | Doctor’s Honest Opinion |
| Infected within 2 weeks of vaccination | Almost 100% “Infected before the vaccine took effect.” | Nearly Zero | “Bad timing. Let’s get the shot earlier next year.” |
| Infected 2+ weeks after vaccination | Fever only up to 38∘C range Fever subsides in 2–3 days Body aches are mild to moderateCough/runny nose are normal | 0–2% (Hospitalization almost nil) | “This is the effect of the vaccine! Without the shot, you’d be in bed with 39–40$^\circ\text{C}$ for 5–7 days.” |
| Severe illness despite vaccination (Hospitalization) | Less than 1 in 1,000 | Under 0.1% | Almost exclusively individuals aged 80+ with underlying conditions who received the standard vaccine. |
| Gets the flu every year despite vaccination | “Only a mild cold level” every year. | Nearly Zero | “If you hadn’t been vaccinated, you’d be getting the 1-week high fever course every year.” |
2025 “Post-Vaccination Infection” Case Examples (Common Clinical Patterns)
| Pattern | Comparison with No Vaccine |
| Vaccinated in Nov → Infected in Jan | 38.5∘C for 2 days, then finished → Only 1 day off work. |
| Vaccinated in Dec → Infected on Dec 25th | 37.8∘C for 1 day (Almost a cold). |
Conclusion
- Even if you contract the flu after getting the shot → 99.9% of people finish with a “mild cold level” illness.
- → Without the shot, a “hellish week” is guaranteed. Therefore, thinking “I got the shot and still got it, so it’s pointless” is a complete misunderstanding!
- Rather, “A mild case is a massive victory!”
